Handheld game developer Astraware has released My Little Tank, an arcade style game for Palm OS devices, Windows Mobile/Pocket PC PDAs, and Windows Mobile Smartphones. From the Astraware product page:

Through 60 action-packed levels you must shoot enemy tanks, defend your base, and destroy enemy radar stations and bases. You will encounter a range of hostile terrains including snow, swamp, plains and deserts. As levels progress, tougher enemies will appear that require more than one shot or more effective weapons.

As you carry out each mission a range of powerups will appear to aid your progress including Smart Bombs that destroy all tanks in the vicinity; Life bonuses to regenerate your tank; Speed to make your tank go faster; Invincibility to protect your tank against the enemy; Weapons upgrades; and Freeze bonuses to halt the enemy tanks and make them easier to blast!

Who'd have thought playing with tanks could be so much fun? You can even choose what colour tank to play with!